13312211021 has 4 divisors (see below), whose sum is σ = 13397002332. Its totient is φ = 13227419712.

The previous prime is 13312210981. The next prime is 13312211027. The reversal of 13312211021 is 12011221331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8428158025 + 4884052996 = 91805^2 + 69886^2 .

It is a cyclic number.

It is not a de Polignac number, because 13312211021 - 2¹⁸ = 13311948877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312211027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42395420 + ... + 42395733.

It is an arithmetic number, because the mean of its divisors is an integer number (3349250583).

Almost surely, 2^13312211021 is an apocalyptic number.

It is an amenable number.

13312211021 is a deficient number, since it is larger than the sum of its proper divisors (84791311).

13312211021 is an equidigital number, since it uses as much as digits as its factorization.

13312211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84791310.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13312211021 its reverse (12011221331), we get a palindrome (25323432352).

The spelling of 13312211021 in words is "thirteen billion, three hundred twelve million, two hundred eleven thousand, twenty-one".